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53 lines
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HTML
53 lines
5.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>返回指定文件的最后修改时间</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.ftp-mdtm" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">ftp_mdtm</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">ftp_mdtm</span> — <span class="dc-title">返回指定文件的最后修改时间</span></p>
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</div>
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<div class="refsect1 unknown-examplet" id="refsect1-function.ftp-mdtm-unknown-examplet">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>ftp_mdtm</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$ftp_stream</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$remote_file</code></span>
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) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>ftp_mdtm()</strong></span> 检查指定文件的最后修改时间，并以 UNIX
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时间戳的方式返回。如果发生错误，或文件不存在则返回 -1。
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</p>
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<p class="para">
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<div class="example" id="example-5316">
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<p><strong>Example #1 <span class="function"><strong>ftp_mdtm()</strong></span> 例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$file </span><span style="color: #007700">= </span><span style="color: #DD0000">'somefile.txt'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// connect to the server<br /></span><span style="color: #0000BB">$conn_id </span><span style="color: #007700">= </span><span style="color: #0000BB">ftp_connect</span><span style="color: #007700">(</span><span style="color: #0000BB">$ftp_server</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$login_result </span><span style="color: #007700">= </span><span style="color: #0000BB">ftp_login</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">, </span><span style="color: #0000BB">$ftp_user_name</span><span style="color: #007700">, </span><span style="color: #0000BB">$ftp_user_pass</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// get the last modified time<br /></span><span style="color: #0000BB">$buff </span><span style="color: #007700">= </span><span style="color: #0000BB">ftp_mdtm</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">, </span><span style="color: #0000BB">$file</span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">$buff </span><span style="color: #007700">!= -</span><span style="color: #0000BB">1</span><span style="color: #007700">) {<br /> </span><span style="color: #FF8000">// somefile.txt was last modified on: March 26 2003 14:16:41.<br /> </span><span style="color: #007700">echo </span><span style="color: #DD0000">"</span><span style="color: #0000BB">$file</span><span style="color: #DD0000"> was last modified on : " </span><span style="color: #007700">. </span><span style="color: #0000BB">date </span><span style="color: #007700">(</span><span style="color: #DD0000">"F d Y H:i:s."</span><span style="color: #007700">, </span><span style="color: #0000BB">$buff</span><span style="color: #007700">);<br />} else {<br /> echo </span><span style="color: #DD0000">"Couldn't get mdtime"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// close the connection<br /></span><span style="color: #0000BB">ftp_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn_id</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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<p class="para">
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如果成功返回一个 UNIX 时间戳，否则返回 -1。
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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某些 FTP 服务器可能会不支持这个特性。
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</p>
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</p></blockquote>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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<span class="function"><strong>ftp_mdtm()</strong></span> 函数不适用于检查目录。
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</p>
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</p></blockquote>
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</div>
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</div></div></div></body></html> |